ISSUE
The issue started between afternoon March 3rd and afternoon March 4th. When I open Dishonored, the video feed on the iPad is extremely bright, nearly all white except for some small color patches. The same video on the desktop looks fine. I tried a few other games and they were unimpacted.

OS
Windows 10 and iPad Steam Link client

STEPS
Start Dishonored from the iPad Steam Link client

RESULTS
I hear audio, but the video is completely unusable. Nearly entirely white.

EXPECTED
On March 3rd, this was working as expected - normal brightness and useable video.

Debugging attempted
* Tried Beta track of Steam
* Restarted computer
* Restarted iPad
* Changed resolution sizes both in Steam client and in the game
* At one point, when I changed resolution in the game I had a brief flash of the correct gamma.
* Adjusted gamma
* Tried other games (they all worked fine)
* Disabled Steam overlay
* Changed input controller